Stoker



Nov. 13, 1934.

R. L. BEERS 1,980,467

STOKER Original Filed Nov. 50, 1928 1 2' H2912 EH3 0000 J Y L Lil 4 65 4 J2 w a? v 1/ 1/ I I i} :g 5 9 ii: 5 32" l 6/ 52" 6 hr: i5? 9 M INVENTOR ATTORNEYS Patented Nov. 13, 1934 UNITED STATES STOKER Royce L. Beers, Detroit, Mich., assignor to Detroit Stoker Company, Detroit, Mich., a corporation of Michigan Original application November so, 1928; Serial No. 322,832. Divided and this application December 19, 1931, Serial No. 582,137

8 Claims.

The invention relates to stokers and more particularly to a novel combination and arrangement of parts tending to simplify, render more efficient and improve generally devices of this character.

This is a division of my copending application, Serial No. 322,832 filed November30, 1928.

One of the objects of this invention is to provide a simple, economical and efficient adjustable connection between the pitman rod of the ram and pusher bar.

In the illustrative embodiment of the invention described, an automatic underfeed stoker of the single retort side dump type is shown.

Figure 1 is a sectional elevational view through a ram case and the lower end of a hopper showing in detail the connection between a crank shaft and connecting rod and connecting rod and push rod;

Figure 2 is a fragmentary detail view taken substantially on the plane indicated by line 5-5 in Figure 1.

Figure 3 is a top plan view of the connecting rod 31;

Figure 4 is a side elevation of the connecting rod with parts broken away and in section;

Figure 5 is an end view of the connecting rod.

Referring now more particularly to the drawing wherein like reference characters indicate like parts it will be noted that there is illustrated a throat 24 of a retort at the forward end of a ram casing 25 within which a ram 26 reciprocates. Supported above the casing 25 is a fuel hopper 27. Fuel fed by gravity from the hopper 27 to the ram casing 25 is fed by the ram 26 into the retort in the customary manner.

The hopper 27 is preferably so mounted as to enable the same to be swung forwardly away from the furnace to provide convenient access to the latter when desirable. To this end the hopper is pivotally connected to the casing 25 as at 28 and the hopper 27 and casing 25 are providedwith apertured ears through which a pin 29 is adapted to be passed for the purpose of holding 45 the hopper in its operative position. Obviously by removing this pin the hopper may be swung about the pivot 28 in a direction away from the furnace front.

The ram is driven by a crank shaft 30 through the medium of connecting rod 31; a. crank pin sleeve 32 and abutments 32 and 33. Preferably abutment 32 is fixed by suitable elements 32" to the rod 31, while abutment 33 is adjustable thereon. Any suitable means such as the pin 34 may be engaged with the openings 35 in the rod 31 to hold the abutment 33 in adjustedposition. Reciprocably mounted .in the bottom of f'the retort is a push rod 47 which is adapted to be operated by the same mechanism whichoperates the ram 26. For this purpose the end of the push rod 47 is bifurcated or slotted as indicated at 49 for the purpose of receivinga block or abutment 50 removably secured in place by means of .a pin 51. The block 50 cooperates with the inner closed end of slot 49 to define a recess 52 for receiving the lower end of a lug or arm 53 that is integral with and extends downwardly from the connecting rod 31 just below the pin 53' connecting the rod 31 to the ram. The clearance between the ends of the recess 52 and the sides of the arm or lug 53 determines the extent of the lostmotion of the driving connection between the connecting rod and the push rod. As will be apparent the abutment blocks 50 are made readily removable so that blocks of different lengths may be substituted whereby the extent of the lost motion in the said connection may be regulated. It will be noted that the lost-motion connection both for driving the ram 26 and'the push rod 47 may be regulated from the exterior of the stoker construction. v

With this construction the pusher bar moves into the same position for every revolution of the crank and the forward movement is determined by the lost-motion of the lug 53 in the slot 52 located at the end of the push rod. One of the several advantages of this construction is that no angularity or load from the push rod is taken through the ram, the force for operating the push rod being all transmitted to and taken up by the connecting rod. In addition the construction is simple, compact and disposed within the ram or ram case.

What I claim as my invention is: 1. In a stoker, a fuel feeding mechanism including a slidably mounted pusher bar having a longitudinally extending slot closed at one end and open at the other, a block within said slot in spaced relation to the closed end thereof, meansextending transversely of opposite sides-of said slot for holding the block within the slot, a ram, a driving rod for the ram pivotally connected thereto, and means for transmitting motion from H the rod to the bar including an arm rigidly attached to said rod and projecting into the slot in the pusher bar.

2. In a stoker, a fuel feeding mechanism including aram, a driving rod therefor pivotally connected thereto and provided adjacent said pivotal connection with a depending arm, a pusher bar having a longitudinally extending slot receiving said arm, said slot being closed at one end and open at the other, a block within said slot cooperating with the closed end thereof to form abutments for the arm, and means extending transversely of opposite sides of the slot for holding said block within said slot.

3. In a stoker, a fuel feeding mechanism including a ram, a driving rod therefor pivotally connected thereto and provided with an arm,, a pusher bar having a longitudinally extending slot receiving said arm, said slot being closed watfgone end and open at the othenra removablebblock within said slot cooperating with the closed end thereof to form abutmentsfor the armandclosing the open end of the slot, the-construction 'lcluding ;a ram, and a pusher bar, said pusher bar and arrangement of the arm, bar and block being such that the arm is alternately engageable with the closed end of the'slot and the block that closes the open end of the slot.

, 14.1111 ,a stoker, a fuel feeding mechanism intudinally extending recess therein, an arm rigidly secured to the driving rod and projecting into jthefrecess in said 1 pusher bar, and adjustable means within therecess for varying the length thereof so as to control the play of the arm there- 5."In a stoker,'a'fuel"feeding mechanism'includingga ram, a driving rod therefor pivotally connected thereto, a pusher bar having a longitudinally extending recess therein, an arm rigidly secured to the driving rod and projecting into the recess in said pusher bar, and means for controlling the play of the arm in said recess.

6. In a stoker, a fuel feeding mechanism including a ram, and a pusher bar, saidpusher ba r having a longitudinally extending slot therein closed at one end and open at the other, an adijustable closure for the open end of said slot, 8. driving rod for the ram pivotally connected thereto, and. means for transmitting motion from the ;rod to the; bar including an arm rigidly secured *to'thewrod-and projecting into the slot in said barrbetweenztheclosed end thereof and the ad- ,J'ustable closure.

,7.'.In astoker, ajfuel feeding mechanism inhavinga longitudinally extending recess therein, adriving rod for the ram pivotally connected thereto a vremovable abutment within said 7 recess, and means for transmitting motion from' the rodto the bar including an arm rigidly} secured to the rod and projecting into the recess between one end thereof and said abutment.

, l 8. In. a stoke r, a fuel feeding mecha ns n'inj eluding ara-m, a driving rod therefor pivotal ly connected thereto, a pusher ,bar having a longitudinally extending recess therein, and an"ar1 n rigidly secured to the driving' rod-and: projecting into the recess in said pusher bar.

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